distributeScoreToOutlinks

This will take the metatags that you have listed in your "urlmeta.tags"
property, and looks for them inside the parseData object. If they exist,
this will be propagated into your 'targets' Collection's ["outlinks"]
attributes.

parseData - ParseData instance, which stores relevant score value(s)
in its metadata. NOTE: filters may modify this in-place, all changes will
be persisted.

targets - <url, CrawlDatum> pairs. NOTE: filters can modify this in-place,
all changes will be persisted.

adjust - a CrawlDatum instance, initially null, which implementations
may use to pass adjustment values to the original CrawlDatum. When creating
this instance, set its status to CrawlDatum.STATUS_LINKED.

allCount - number of all collected outlinks from the source page

Returns:

if needed, implementations may return an instance of CrawlDatum,
with status CrawlDatum.STATUS_LINKED, which contains adjustments
to be applied to the original CrawlDatum score(s) and metadata. This can
be null if not needed.

parse - parsing result. NOTE: changes made to this instance are not persisted.

inlinks - current inlinks from LinkDb. NOTE: changes made to this instance are
not persisted.

initScore - initial boost value for the Lucene document.

Returns:

boost value for the Lucene document. This value is passed as an argument
to the next scoring filter in chain. NOTE: implementations may also express
other scoring strategies by modifying Lucene document directly.

old - original datum, with original score. May be null if this is a newly
discovered page. If not null, filters should use score values from this parameter
as the starting values - the datum parameter may contain values that are
no longer valid, if other updates occured between generation and this update.

datum - the new datum, with the original score saved at the time when
fetchlist was generated. Filters should update this in-place, and it will be saved in
the crawldb.

inlinked - (partial) list of CrawlDatum-s (with their scores) from
links pointing to this page, found in the current update batch.